Add brew keg-only dependencies to CMAKE_PREFIX_PATH

Author: cschreib

.github/workflows/cmake.yml

@@ -17,7 +17,7 @@ jobs:
         - { name: Ubuntu Clang, os: ubuntu-latest,  compiler: clang++, arch: "64", cmakepp: "",        suffix: "",            flags: "-DCMAKE_CXX_COMPILER=clang++"}
         - { name: Windows 32,   os: windows-latest, compiler: vs2019,  arch: "32", cmakepp: "",        suffix: "",            flags: "-DCMAKE_PREFIX_PATH=`pwd`/../dependencies -A Win32"}
         - { name: Windows 64,   os: windows-latest, compiler: vs2019,  arch: "64", cmakepp: "",        suffix: "",            flags: "-DCMAKE_PREFIX_PATH=`pwd`/../dependencies -A x64"}
-        - { name: MacOS,        os: macos-latest,   compiler: clang++, arch: "64", cmakepp: "",        suffix: "",            flags: ""}
+        - { name: MacOS,        os: macos-latest,   compiler: clang++, arch: "64", cmakepp: "",        suffix: "",            flags: "-DCMAKE_PREFIX_PATH=/opt/homebrew/opt/sfml@2;/opt/homebrew/opt/zlib"}
         - { name: WebAssembly,  os: ubuntu-latest,  compiler: em++,    arch: "32", cmakepp: "emcmake", suffix: "-emscripten", flags: "-DCMAKE_PREFIX_PATH=`pwd`/../dependencies -DCMAKE_FIND_ROOT_PATH=/ -DLXGUI_TEST_IMPLEMENTATION=OPENGL_SDL"}
 
     name: ${{matrix.platform.name}}